Question: The image below used a bar chart to summarize the results of an assessment taken at four times. What feature in the figure summarizes the

The image below used a bar chart to summarize the results of an assessment taken at four times. What feature in the figure summarizes the standard error or the mean for these data?

60 Time to Complete Task 50 40 T 30 20 T 10

a. The height of the rectangular bars in the figure.

b. The distance between the rectangular bars in the figure.

c. The vertical lines extending above and below each mean plot.

60 Time to Complete Task 50 40 T 30 20 T 10 0 Time 1 Time 2 Time 3 Time 4 Time of Observation

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